I believe the answer is: russia
During his teens, Claude debussy had the opportunity to work with <span>wealthy patroness of </span>Pyotr Ilyich Tchaikovsky in Russia.
At that place, he acquired the taste of <span> ancient and oriental modes and for vivid coloration that exist in russian music</span>
Northern city is the answer
Most are Christians: either Roman Catholic or Protestant.
It depends. If the museum is famous and popular then there could be more than 100 people there. If the museum is small and unknown, then there could be very small groups. I didn't really understand your question but I hope this helps!